1 research outputs found
Electronic Tuning of Active Sites in Bifunctional Covalent Organic Frameworks for Photoassisted CO<sub>2</sub> Electrocatalytic Full Reaction
Realizing simultaneously energy-efficiency improvement
and green
economic implementation remains a daunting challenge in addressing
the low-efficiency issues of CO2 electroreduction to meet
the sustainable development strategy. Here, we propose a series of
porphyrin-based COFs (TTCOF-M, M = Co, Ni, and Cu) as model catalysts to study the hybrid CO2 electrocatalytic
full reaction for the first time, during which the catalysts can simultaneously
accomplish photoassisted CO2 electroreduction and 4-nitrophenol
(4-NP) mineralization. As model catalysts, the effects of various
parameters have been intensively studied from typical tandem electro-reactions
to extended photoassisted ones. Specifically, TTCOF-Co can achieve the cathodic reduction efficiency increasing from 90
to 96% (−0.7 V) after illumination and simultaneously 5 times
shortened reaction time with a 4-NP degradation efficiency of ∼99%.
Notably, the 4-NP mineralization rate is calculated to be ∼93.51%
with ∼30.27 mmol/g/h CO2 production rate, and a
rarely investigated mechanism relating to the 4-NP electro-degradation
has been intensively studied